bed

Abstract

We offer a bed that can accommodate two mattresses with widths of 830mm and between 870mm and 910mm. [Solution] A bed in which a first mattress with a width of 830 mm and a second mattress with a width of 870 mm or more and 910 mm or less, which is wider than the first mattress, can be selectively used, and the bed is equipped with a base on which the first mattress or the second mattress is placed, the width of the base being 830 mm or more and 910 mm or less.

Description

Technical Field

[0001] Embodiments of the present invention relate to a bed.

Background Art

[0002] There are mainly two sizes in the width direction of a mattress, 830 mm (commonly called 830) and 910 mm (commonly called 910). And in order to fit these two sizes, there are two bottoms provided on the bed, with width dimensions of 830 mm (commonly called 830) and 900 mm (commonly called 910) in the width direction. For example, in order to fit a mattress with a width dimension of 830 mm, a bottom with a width dimension of 830 mm was used, and in order to fit a mattress with a width dimension of 900 mm, a bottom with a width dimension of 900 mm was used. Thus, two bottoms were used to deal with two mattresses with different width dimensions.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of embodiments of the present invention is to provide a bed that can accommodate two mattresses with width dimensions of 830 mm and 870 mm or more and 910 mm or less with one bed.

Means for Solving the Problems

[0005] A bed according to an embodiment of the present invention is a bed on which a first mattress with a width of 830 mm and a second mattress with a width of 870 mm or more and 910 mm or less, which are both selectively usable, and which includes a base on which the first mattress or the second mattress is placed, the width of the base being 850 mm or more and 910 mm or less. [Effects of the Invention]

[0006] According to an embodiment of the present invention, one bed can accommodate two mattresses with widths of 830 mm and 870 mm to 910 mm. [Brief explanation of the drawing]

[0007] [Figure 1] Figure 1 is a perspective view of the bed according to this embodiment, seen from diagonally above. [Figure 2] Figure 2 is a top view of the bed according to the embodiment. [Figure 3] Figure 3 is a front view of the bed according to the embodiment, viewed from the width direction, showing the state in which the first mattress is placed on the bottom. [Figure 4] Figure 4 is a front view of the bed according to the embodiment, viewed from the width direction, showing the state in which the second mattress is placed on the bottom. [Figure 5] Figure 5 is an enlarged view of the dashed line portion shown in Figure 4, and shows the second mattress placed on a base with a width of 860 mm. [Figure 6] Figure 6 shows the configuration shown in Figure 5, with one mattress placed on a base with a width of 900 mm. [Figure 7] Figure 7 shows the configuration shown in Figure 5, with the second mattress placed on a base with a width of 860 mm. [Figure 8] Figure 8 shows the configuration shown in Figure 5, with one mattress placed on a base with a width of 900 mm. [Figure 9] Figure 9 is a summary of the constraints A1 to E on the bottom width. [Figure 10] Figure 10 is an explanatory diagram of the frame and support mechanism. [Figure 11] Figure 11 is an enlarged view of the dashed line portion shown in Figure 10. [Figure 12] Figure 12 is an explanatory diagram of the recess in the bottom and the mattress stopper. [Figure 13] Figure 13 is a perspective view showing the mattress stopper fitted into the recess in the bottom when it is used with the first mattress. [Figure 14] Figure 14 is a perspective view showing the mattress stopper fitted into the recess in the bottom when it is used with the second mattress. [Figure 15] Figure 15 is an overall perspective view showing the mattress stopper fitted into the recess in the bottom when it is used with the first mattress. [Figure 16] Figure 16 is an overall top view showing the mattress stopper fitted into the recess in the bottom when it is used with the first mattress. [Figure 17] Figure 17 is an overall perspective view showing the mattress stopper fitted into the recess in the bottom when it is used with the second mattress. [Figure 18] Figure 18 is an overall top view showing the mattress stopper fitted into the recess in the bottom when it is used with the second mattress. [Modes for carrying out the invention]

[0008] Embodiments of the present invention will be described below with reference to the drawings. In this specification, when a user lies on their back on a bed or a mattress, the direction where the head is located as seen from the torso is referred to as the "head side" (+Y side), the direction where the feet are located is referred to as the "foot side" (-Y side), the direction where the right hand is located is referred to as the "right side" (-X side), the direction where the left hand is located is referred to as the "left side" (+X side), the direction where the floor of the room is located is referred to as the "lower side" (-Z side), and the direction where the ceiling is located is referred to as the "upper side" (+Z side). The right side and the left side are collectively also referred to as the "width direction" (X direction), and the upper side and the lower side are collectively also referred to as the "vertical direction" (Z direction). Among the width direction, the direction from the center of the bed towards the left side or the right side is also referred to as the "outer side", and the direction from the left side or the right side towards the center of the bed is also referred to as the "inner side".

[0009] The bed 100 according to this embodiment will be described. The bed 100 according to this embodiment is used, for example, in nursing facilities, hospitals, and private homes, and is an electric bed whose height, such as that of the backrest and the knees, can be operated electrically. Hereinafter, the bed 100 according to this embodiment will be described using the drawings.

[0010] FIG. 1 is a perspective view of the bed 100 according to this embodiment as seen obliquely from above. FIG. 2 is a top view of the bed 100 according to this embodiment as seen from above. As shown in FIGS. 1 and 2, the bed 100 according to this embodiment includes a bottom 10. On the bottom 10, a first mattress M1 with a width of 830 mm (commonly known as 830) or a second mattress M2 with a width of 910 mm (commonly known as 910) is arranged. In the bed 100 according to this embodiment, it is also a bed that can selectively use a mattress with a width of 830 mm or more and 910 mm or less on the bottom 10. Also, the width of the first mattress is 830 mm, and the width of the second mattress is 870 mm or more and 910 mm or less. Note that the width of the second mattress is mainly 900 mm or 910 mm.

[0011] The bottom 10 has, in order from the foot side towards the head side, a foot bottom 11, a knee bottom 12, a waist bottom 13, and a back bottom 14.

[0012] FIG. 3 is a front view of the bed 100 according to the embodiment as viewed in the width direction, showing a state where the first mattress M1 is disposed on the bottom 10. FIG. 4 is a front view of the bed 100 according to the embodiment as viewed in the width direction, showing a view where the second mattress M2 is disposed on the bottom 10. The bed 100 according to the present embodiment can selectively use both the first mattress M1 with a width of 830 mm and the second mattress M2 with a width of 870 mm or more and 910 mm or less on one bottom 10.

[0013] Conventionally, two types of bottoms were required: a bottom for 830 mm corresponding to a mattress with a width of 830 mm and a bottom for 900 mm corresponding to a mattress with a width of 910 mm. The bed 100 according to the present embodiment can accommodate two types of mattresses with different width sizes on one bottom 10. At this time, various gap dimensions and overhang dimensions are important for the bed 100 according to the embodiment. The various gap dimensions and overhang dimensions require requirements for the bottom 10 such as a safety aspect that the neck and head are not caught in the gap between the mattress and the bottom 10 and the side rail 30. The various gap dimensions A and B and overhang dimensions C and D will be described below.

[0014] <Dimension A> FIG. 5 is an enlarged view of the dashed line portion shown in FIG. 4, showing a state where the second mattress M2 is disposed on the bottom 10 with a width size of 860 mm in the width direction. In the following description, the second mattress M2 with a width of 900 mm will be used for explanation. In FIG. 5, for convenience of explanation, it is partially simplified. The same applies to FIGS. 6 to 8 described later. FIG. 5 shows a state where a large-width mattress is disposed on a small-width bottom 10. The side rail 30 is provided outside the bottom 10, the first mattress M1, and the second mattress M2. The side rail 30 has a grid-like side rail main body 31 and a side rail leg 32 that is connected to the side rail main body 31 and inserted into an insertion portion 34 of the side rail support 33. In FIG. 5, the side rail 30 is viewed from the front side of the bed 100.

[0015] Dimension A (hereinafter also referred to as gap A) is the hypotenuse of the triangle formed by the distance (S-(U / 2)) between the end 10a of the bottom 10 and the side rail 30, and the height (H) from the upper end 10b of the bottom 10 to the lower end 31a of the side rail body 31. Here, U is the width of the bottom. S is the distance from the center O of the bed 100 in the width direction to the side rail 30 when the second mattress M2 is placed, and is 463.9 mm. This is adjustable in the bed 100 and is the smallest value that does not cause problems in the product specifications of the second mattress M2, which has a width of 900 mm. Here, 463.9 mm is the value of width of the second mattress M2 / 2 + 13.9 mm. The distance between the end 10a of the bottom 10 and the side rail 30 is a variable value, but since interference with the side rail 30 in the movable parts (bottom, mattress on the bottom) poses a risk of damage, a clearance is provided, and it is designed to be 13.9 mm from the outer end of the bottom 10 or mattress. H is the height from the upper end 10b of the bottom 10 to the lower end 31a of the side rail body 31, and is a variable value depending on the design, but is set to 19.9 mm. The end 10a of the bottom 10 refers to the point that protrudes the most in the X direction (-X direction in Figure 5). The design values ​​for the size of the mattress and bottom 10 are set in 10 mm increments. Therefore, the ranges described later will be shown in 10 mm units.

[0016] It is necessary to prevent the neck or head from getting caught in this gap A, and JIS T 9254 specifies that the gap between the bottom and side rails should be less than 60 mm. Therefore, dimension A is less than 60 mm. In this case, since dimension A is a right triangle, the bottom width U can be calculated using equation (1) below. Dimension A = √(((S - (U / 2)) 2 +H 2 )) (1)

[0017] Furthermore, it is necessary to ensure that the side rails 30 do not interfere with the bottom 10 and the mattress.

[0018] Therefore, the range of bottom widths required to satisfy the above constraint of less than 60 mm and to prevent interference between the side rail 30 and the bottom 10 is 820 mm or more (820 ≤ bottom width) (Constraint A1). If the bottom width U is less than 820 mm, dimension A exceeds 60 mm, so the bottom width U must be 820 mm or more.

[0019] Furthermore, the deflection and rattle of the side rail 30 must be taken into consideration. In this case, if 5 mm is added to the value of height H and 15 mm is added to the value of distance S, the range of the bottom width U will be 850 mm or more (850 ≤ bottom width U) from equation (1) (constraint A2). If the bottom width U is less than 850 mm, the deflection and rattle of the side rail 30 may cause dimension A to exceed 60 mm, and the head may fall into this gap A, so the bottom width U must be 850 mm or more.

[0020] <Dimension B> Figure 6 shows the configuration shown in Figure 5, where the first mattress M1 is placed on a bottom 10 with a width of 900 mm. Figure 6 shows the configuration where a mattress with a smaller width is placed on a bottom 10 with a larger width. Dimension B (Dimension B = SM / 2) (hereinafter, Dimension B will also be called Gap B) is the distance between the end M1a of the first mattress M1 and the side rail 30. It is necessary to prevent the neck or head from getting caught in this gap B, and JIS T 9254 specifies that a conical tool (φ120 mm / 5.1 kg) should not sink more than halfway into the gap between the side rail and the mattress under its own weight. Therefore, Dimension B is less than 120 mm. The distance S from the center O of the bed 100 to the side rail 30 in the width direction is adjustable in the bed 100, and is set to S = (U / 2) + 13.9 mm. The 13.9 mm is as described above. M is the width of the mattress. Furthermore, considering 13.9 mm in the design, in the equation (U / 2) + 13.9 - (M / 2) ≥ B, the maximum value of U for which the dimension B is 120 mm or less is 1040 mm.

[0021] Therefore, the range of the bottom width U that satisfies the above constraint of less than 120 mm and prevents interference between the side rail 30 and the bottom 10 is 1040 mm or less (bottom width ≤ 1040) (constraint B1). If the bottom width U exceeds 1040 mm, dimension B will exceed 120, so the bottom width U must be 1040 mm or less.

[0022] Furthermore, the sagging of the mattress and the deflection and rattling of the side rails 30 must be taken into consideration. In this case, if the mattress sags and narrows by 30 mm towards the center of the mattress, and the side rails 30 deflect outwards by 15 mm, the range of the bottom width U must be 950 mm or less (bottom width U ≤ 950) (constraint B2).

[0023] <Dimension C> Figure 7 shows the state in which the second mattress M2 is placed on the bottom 10, which has a width of 860 mm, as shown in Figure 5. Figure 7 shows the state in which a mattress with a larger width is placed on a bottom 10 with a smaller width. Dimension C (hereinafter also referred to as overhang amount C) is the distance between the edge 10a of the bottom 10 and the edge M2a of the second mattress M2. When getting out of bed and during caregiving activities, sitting on the edge of the bed, using hands, feet, and knees are assumed, and the parts that support body weight during these movements are the fists, buttocks, feet, and knees. At this time, the overhang area must be 50% or less of the area of ​​the knees, etc., and preferably 25% or less (ensuring a supporting area of ​​50% or more, preferably 75% or more, of the area of ​​the knees, etc.). The dimensions of the above parts are determined from human body dimension data. Of the above areas, the knee area is the smallest, and its diameter is φ110mm according to human body dimension data. Therefore, 50% of φ110mm is 55mm, and 25% of φ110mm is 27.5mm. In other words, dimension C is 55mm or less, preferably 27.5mm or less, and the smaller the better. If it is 50% or less, then 800 ≤ bottom width U, and if it is 25% or less, then 860 ≤ bottom width U.

[0024] Furthermore, as mentioned above, the minimum distance between the end 10a of the bottom 10 and the side rail 30 is 13.9 mm by design, and a gap of 13.9 mm is required.

[0025] Therefore, the range of the bottom width U required to satisfy the above constraint of 55 mm or less is 800 mm or more (800 ≤ bottom width U), preferably 850 mm or more (850 ≤ bottom width U) (Constraint C). If the bottom width U is less than 800 mm, the constraint of 55 mm or less will not be satisfied, and when a fist touches the mattress while getting out of bed, the mattress will sag downwards, making the part that supports body weight unstable and unable to support body weight. Therefore, the bottom width U should be 800 mm or more.

[0026] <Dimension D> Figure 8 shows the configuration shown in Figure 5, where the first mattress M1 is placed on a base 10 with a width of 900 mm. Figure 8 shows the configuration where a smaller mattress is placed on a larger base 10. The main reason for choosing the first mattress M1, which has a width of 830 mm, is when placing a bed in a narrow space. Dimension D (hereinafter also referred to as overhang amount D) is the distance between the end 10a of the base 10 and the end M1a of the first mattress M1. Since the total width of the bed should ideally be smaller from the perspective of installation space, it is considered better if dimension D is smaller.

[0027] Therefore, the bottom width U is in the range of 830 mm or more (830 ≤ bottom width U), and within this range, the smaller the better, preferably 870 mm or less (bottom width U ≤ 870) (constraint D).

[0028] <Dimension E> When the second mattress M2 is placed on the bottom 10, the overall width should be as small as possible from the standpoint of installation space and transportation. If the bottom width U is less than 910 mm, the overall width (dimension E) is determined by the mattress width, and this value is the minimum value of the overall width E. Therefore, the range of the bottom width U is 910 mm or less (bottom width U ≤ 910) (constraint E).

[0029] Based on the above, and summarizing constraints A1 to E, the width of the bottom 10 will be within the range shown in Figure 9 and will be determined as follows. The lower limit of the width of the bottom 10 will be 830 mm or more and 850 mm or more, taking into account the deflection and rattle of the side rail 30 in dimension A and satisfying the constraint of dimension A or dimension D. The upper limit of the width of the bottom 10 will be 910 mm or less, satisfying the constraint of dimension C, which is due to the design requirement of a 13.9 mm gap between the end 10a of the bottom 10 and the side rail 30, and satisfying the constraint of dimension E. Therefore, the width of the bottom 10 will be 850 mm or more and 910 mm or less.

[0030] The preferred width of the bottom 10 is determined as follows. The lower limit of the width of the bottom 10 is 860 mm or more, and the smaller the dimension C, the better, considering the deflection and rattle of the side rail 30 in dimension A and satisfying the constraint of dimension A, and satisfying the preferred range of dimension C, with the smaller dimension C being better. The smaller the dimension C, the better (the larger the bottom width). The upper limit of the width of the bottom 10 is 910 mm or less, and the smaller the dimensions D and E are, the better, considering the constraint of dimension C, which is required to have a design gap of 13.9 mm between the end 10a of the bottom 10 and the side rail 30, and satisfying the constraint of dimension D and E. Therefore, the preferred width of the bottom 10 is in the range of 860 mm or more and 910 mm or less. Within this range, the preferred bottom width can be selected based on the priority of dimensions C, D, and E.

[0031] The following provides a detailed explanation of the problems with conventional beds and the advantages of the bed 100 according to this embodiment.

[0032] Traditionally, two different mattress widths were required to accommodate two different mattress widths. Since many care beds are rented, managing beds with two different mattress widths separately created a burden on inventory management. Furthermore, manufacturing two different mattress widths also added a manufacturing burden. Additionally, when providing beds to users, a bed with one mattress width was delivered, and if it didn't fit, another bed with a different mattress width had to be delivered, resulting in delays in delivery.

[0033] Furthermore, to accommodate two mattresses of different widths with a single base, it is conceivable to attach a flap or edge component to the right or left side of the base to widen it. However, this mechanism presents problems such as increased manufacturing costs and a complex and difficult manufacturing process. In addition, the strength of the mechanism is insufficient, making it difficult to accommodate mattresses of two different widths.

[0034] Therefore, according to the bed 100 of this embodiment, one base 10 can accommodate two mattresses of different widths, thus reducing the burden of product management and manufacturing mentioned above, and enabling immediate response on-site, thus reducing the time delay until delivery. This also reduces the burden on users. Furthermore, since one base 10 can accommodate two mattresses of different widths, the number of units manufactured and discarded is reduced, which is also beneficial from an environmental perspective.

[0035] The significance of a bottom 10 width of 850mm or more and 910mm or less, and a preferred range of 850mm or more and 870mm or less, will be further detailed below.

[0036] Figure 10 is an explanatory diagram of the frame and support mechanism 40. As shown in Figure 10, the bed 100 according to this embodiment further comprises a first frame 20 (frame) and a support mechanism 40.

[0037] The first frame 20 is a member to which the bottom 10 is attached. The second frame 21 is attached to the first frame 20. The first frame 20 extends in the width direction of the bottom 10. The second frame 21 extends in a direction perpendicular to the width direction. The first frame 20 and the second frame 21 are formed in a rectangular shape by combining, for example, cylindrical metal members.

[0038] The support mechanism 40 supports the side rail support 33. The support mechanism 40 is attached to the first frame 20 and its position along the width direction of the bottom 10 can be selected, and together with the side rail support 33 it supports the side rail 30.

[0039] Figure 11 is an enlarged view of the dashed line portion shown in Figure 10. As shown in Figure 11, the first frame 20 has two or more holes 22 provided along the width direction of the bottom 10. The first frame 20 shown in Figure 11 has two holes 22. Two or more holes 22 are provided on at least one of the left and right sides of the first frame 20.

[0040] The support mechanism 40 has a claw portion 43 that engages with at least one of two or more holes 22. The support mechanism 40 is composed of a main body portion 41 and two support portions 42 that extend in the width direction from the main body portion 41. The support mechanism 40 may be provided on the right and left first frames 20, respectively. The claw portion 43 is on the lower side and extends from the support portion 42 toward the first frame 20. By engaging the claw portion 43 with the hole 22, the position of the side rail 30 can be adjusted. For example, when selecting a first mattress M1 with a narrower width of 830 mm, the claw portion 43 is engaged with the hole 22 located on the inside (+X side). On the other hand, when selecting a second mattress M2 with a wider width of 900 mm, the claw portion 43 is engaged with the hole 22 located on the outside (-X side). In this way, the position of the side rail 30 is adjusted by the hole 22 and the claw portion 43.

[0041] In this way, the position of the side rail 30 can be adjusted, thereby more effectively satisfying the constraints of dimensions A, B, C, and D mentioned above.

[0042] After the claw portion 43 engages with the hole 22, the support mechanism 40 and the first frame 20 can be fixed by passing bolts through the bolt holes 23 and 44 and using nuts.

[0043] As shown in Figure 10, a drive mechanism 60 is attached to the second frame 21. The drive mechanism 60 includes a plurality of actuators. The drive mechanism 60, including the actuators, allows the bottom 10 to be displaced along the vertical direction.

[0044] Furthermore, the foot bottom 11, waist bottom 13, and back bottom 14 can be tilted by a drive means 60 including an actuator.

[0045] Figure 12 is an explanatory diagram of the recess 15 in the bottom 10 and the mattress stopper 50. Figure 13 is a perspective view showing the mattress stopper 50 fitted into the recess 15 in the bottom 10 when it corresponds to the first mattress M1. Figure 14 is a perspective view showing the mattress stopper 50 fitted into the recess 15 in the bottom 10 when it corresponds to the second mattress M2. Figure 15 is an overall perspective view showing the mattress stopper 50 fitted into the recess 15 in the bottom 10 when it corresponds to the first mattress M1. Figure 16 is an overall top view showing the mattress stopper 50 fitted into the recess 15 in the bottom 10 when it corresponds to the first mattress M1. Figure 17 is an overall perspective view showing the mattress stopper 50 fitted into the recess 15 in the bottom 10 when it corresponds to the second mattress M2. Figure 18 is an overall top view showing the mattress stopper 50 fitted into the recess 15 of the bottom 10 when it corresponds to the second mattress M2.

[0046] As shown in Figures 12, 13, 14, 15, and 16, the bed 100 according to this embodiment further includes a mattress stopper 50 provided at the end 14a of the foot bottom 14 (end 10a of the bottom 10) to prevent the mattress from shifting in the width direction. By including the mattress stopper 50, the bed 100 according to this embodiment can prevent the first mattress M1 and the second mattress M2 from shifting in the width direction, and can more accurately satisfy the constraints of dimensions A, B, C, and D described above.

[0047] As shown in Figure 12, the mattress stopper 50 consists of a base portion 51 that abuts against the surface of the lower mattress and a side portion 52 that rises vertically from the outside of the base portion 51. The side portion 52 abuts against the side of the mattress. The bottom 10 has two or more recesses 15 provided along the width direction of the bottom 10. The mattress stopper 50 also has a protrusion 53 that engages with at least one of the two or more recesses 15. The protrusion 53 extends from the base portion 51 in the direction opposite to the side portion 52.

[0048] As shown in Figure 12, it is preferable that the bottom 10 has three recesses 15 and two protrusions 53. One protrusion 53 is also acceptable, but having two allows the mattress stopper 50 to stably fit into the recesses 15, and more effectively satisfies the constraints of dimensions A, B, C, and D mentioned above.

[0049] Furthermore, it is preferable that the recess 15 has a groove 16 along the downward direction, and the protrusion 53 has a projection 54 that engages with the groove 16 of the recess 15. The projection 54 is provided on the protrusion 53. In this way, the mattress stopper 50 can be firmly and stably engaged with the recess 15.

[0050] The mattress stoppers 50 attached to the bottom 10, as shown in Figures 13, 15, and 16, are positioned for the first mattress M1, which has a width of 830 mm. The first mattress M1 is placed on the bottom 10, and the mattress stoppers 50 prevent the mattress from shifting in the width direction.

[0051] The mattress stoppers 50 attached to the bottom 10, as shown in Figures 14, 17, and 18, are positioned for the second mattress M2, which has a width of 900 mm. The mattress stoppers 50 shown in Figures 17 and 18 are positioned further outward than the mattress stoppers 50 shown in Figures 15 and 16. The second mattress M2 is placed on the bottom 10, and the mattress stoppers 50 prevent the mattress from shifting in the width direction.

[0052] Furthermore, as shown in Figures 12, 13, and 14, it is preferable to have identification marks 70 around the recess 15 to make it easier to recognize whether the first mattress M1 or the second mattress M2 has been selected.

[0053] The mattress stoppers 50 shown in Figures 12, 13, 14, 15, 16, 17, and 18 are provided at both ends 14a in the width direction of the foot bottom 14, but are also provided at the back bottom 11.

[0054] Based on the above, according to the embodiment of the present invention, a single bed can accommodate mattresses with width dimensions of 830 mm and between 870 mm and 910 mm.

[0055] The embodiments and their modifications described above are examples that embody the present invention, and the present invention is not limited to these embodiments and modifications. For example, the present invention also includes the addition, deletion, or modification of some components or processes in the embodiments and modifications described above. Furthermore, the embodiments and modifications described above can be implemented in combination with each other.

[0056] The present invention includes the following embodiments.

[0057] (Note 1) A bed in which both a first mattress M1 with a width of 830 mm and a second mattress with a width of 870 mm or more and 910 mm or less, which is wider than the first mattress, can be used selectively. The base on which the first mattress or the second mattress is placed is provided. The bed has a bottom width of 830 mm or more and 910 mm or less.

[0058] (Note 2) The bed described in Appendix 1 has a second mattress width of 900 mm.

[0059] (Note 3) The width of the second mattress is 910 mm, as described in Appendix 1 of the bed.

[0060] (Note 4) The bed whose bottom width is 850 mm or more and 910 mm or less, as specified in one of the appendices 1 to 3.

[0061] (Note 5) The bed whose bottom width is 850 mm or more and 870 mm or less, as specified in one of the appendices 1 to 4.

[0062] (Note 6) A frame extending in the width direction of the bottom and attached to the bottom, A support mechanism attached to the frame, which can be positioned along the width direction of the bottom, and which supports the side rails, A bed that further includes any one of the appendices 1 to 5.

[0063] (Note 7) The frame has two or more holes provided along the width direction of the bottom, The support mechanism is the bed according to Appendix 6, having a claw portion that engages with at least one of the two or more holes.

[0064] (Note 8) A mattress stopper is provided at the end of the bottom to prevent the mattress from shifting in the width direction, A bed that further includes any one of the features described in Appendix 1 to 7.

[0065] (Note 9) The bottom has two or more recesses provided along the width direction of the bottom, The mattress stopper is a bed according to Appendix 8, having a protrusion that engages with at least one of the two or more recesses. [Explanation of Symbols]

[0066] 10 bottom, 10a (bottom) edge, 10b (bottom) upper edge, 11 foot bottom, 12 knee bottom, 13 waist bottom, 14 back bottom, 14a (foot bottom) edge, 15 recess, 16 groove, 20 First frame (frame), 21 Second frame, 22 Hole, 23 Bolt hole, 30 Side rail, 31 Side rail body, 31a Lower end of side rail body, 32 Side rail foot, 33 Side rail support, 34 Insertion part, 40 Support mechanism, 41 Main body, 42 Support part, 43 Claw part, 44 Bolt hole, 50 Mattress stopper, 51 Base, 52 Side, 53 Convex part, 54 Projection, 60 Drive means, 70 Identification marks, 100 beds, M1 First mattress, M1a (end of the first mattress), M2 Second mattress, M2a (end of the second mattress), O Center of the bed

Claims

1. A bed in which both a first mattress with a width of 830 mm and a second mattress with a width of 870 mm or more and 910 mm or less, which is wider than the first mattress, can be used selectively. The base on which the first mattress or the second mattress is placed is provided. The bed has a bottom width of 830 mm or more and 910 mm or less.

2. The bed according to claim 1, wherein the width of the second mattress is 900 mm.

3. The bed according to claim 1, wherein the width of the second mattress is 910 mm.

4. The bed according to claim 1, wherein the width of the bottom is 850 mm or more and 910 mm or less.

5. The bed according to claim 1, wherein the width of the bottom is 850 mm or more and 870 mm or less.

6. A frame extending in the width direction of the bottom and attached to the bottom, A support mechanism attached to the frame, which can be positioned along the width direction of the bottom, and which supports the side rails, The bed according to claim 1, further comprising:

7. The frame has two or more holes provided along the width direction of the bottom, The bed according to claim 6, wherein the support mechanism has a claw portion that engages with at least one of the two or more holes.

8. A mattress stopper is provided at the end of the bottom to prevent the mattress from shifting in the width direction, A bed according to any one of claims 1 to 7, further comprising the above.

9. The bottom has two or more recesses provided along the width direction of the bottom, The bed according to claim 8, wherein the mattress stopper has a protrusion that engages with at least one of the two or more recesses.

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